A) \[3d-11\]
B) \[2d+19\]
C) \[3d-7\]
D) \[5d-11\]
Correct Answer: C
Solution :
Let first number be ?a?. Second number = a + 2d + 5 Third number = a + 2d + 5 ? 3d + 20 \[=a-d+25\] Sum: \[a+a+2d+5+a-d+25=10d+9\] \[\Rightarrow \,\,3a+d+30=10d+9\Rightarrow \,3a+30=9d+9\] \[\Rightarrow \,\,a+10=3d+3\] \[\Rightarrow \,\,a=3d-7\]You need to login to perform this action.
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